[feat] engines: add podchaser podcast engine (#6202)

- add podchaser podcast engine
- the motivation is that podcastindex had to be removed, see #6140

searx/engines/podchaser.py

@@ -0,0 +1,62 @@
+# SPDX-License-Identifier: AGPL-3.0-or-later
+"""Podchaser (podcasts)"""
+
+import typing as t
+
+from datetime import datetime
+from urllib.parse import urlencode
+
+from searx.result_types import EngineResults
+
+if t.TYPE_CHECKING:
+    from searx.extended_types import SXNG_Response
+    from searx.search.processors import OnlineParams
+
+about = {
+    "website": "https://www.podchaser.com",
+    "official_api_documentation": "https://www.podchaser.com/api",
+    "use_official_api": False,
+    "require_api_key": False,
+    "results": "JSON",
+}
+categories = []
+paging = True
+
+base_url = "https://api.podchaser.com"
+page_size = 25
+
+
+def request(query: str, params: "OnlineParams") -> None:
+    args = {
+        "filters[term]": query,
+        "limit": page_size,
+        "offset": (params["pageno"] - 1) * page_size,
+        "sort_direction": "desc",
+        "sort_order": "SORT_ORDER_RELEVANCE",
+    }
+    params["url"] = f"{base_url}/podcasts?{urlencode(args)}"
+    params["headers"]["Accept"] = "application/prs.podchaser.v2+json"
+
+
+def response(resp: "SXNG_Response"):
+    res = EngineResults()
+
+    json_results: list[dict[str, str]] = resp.json()["entities"]  # pyright: ignore[reportAny]
+
+    for result in json_results:
+        metadata = [f"{result['number_of_episodes']} episodes"]
+        if result["categories"]:
+            metadata.append(", ".join(c["text"] for c in result["categories"]))  # pyright: ignore[reportArgumentType]
+
+        res.add(
+            res.types.MainResult(
+                url=result["feed_url"],
+                title=result["title"],
+                content=result["description"],
+                thumbnail=result["image_url"],
+                publishedDate=datetime.strptime(result["created_at"], "%Y-%m-%d %H:%M:%S"),
+                metadata=" | ".join(metadata),
+            )
+        )
+
+    return res